press e to build press space to NUKE! drag the slider on the left to change the explosion size the click the numbers on the right to change build size example: x: 7, y: 8 creates: ▮▮▮▮▮▮▮ ▮▮▮▮▮▮▮ ▮▮▮▮▮▮▮ ▮▮▮▮▮▮▮ ▮▮▮▮▮▮▮ ▮▮▮▮▮▮▮ ▮▮▮▮▮▮▮ ▮▮▮▮▮▮▮ click the colored label on right to change the material